Warp stop-motion for looms.



G. P. ERHARD.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED 1uLY17. 1914.

1,174,928. Patented Mar. 7,1916.

THE COLUMBIA PLANOGRAPH c0., WASHINGTON, n. c.

'r s 'r s are.

OF BROOKLINE, MASSACHUSETTS, ASSIGNOE TO THE STAFFORD A CORPORATION OF NEW GEORGE 1. ERI-IABD,

COMPANY, OF READVILLE, BOSTON, MASSACHUSETTS,

JERSEY.

. WARP STOP-MOTION FOR LOOMS.

Patented Mar. 7, 1916.

Application filed July 17, 1914. Serial No. 851,630.

1,174,928, Specification of Letters Patent.

The general object of the invention is to provide in a warp-stop motion a warpdividing rod or rods of novel and improved character and construction adapted to render it practicable to locate all or some of the drop-wires in line vertically with the lease-rods, or one of the latter, so as to leave the space between the lease-rods either To all whom it may concern:

Be it known that I, GEORGE P. ERI-IARD, a citizen of the United States, residing at Brookline, in the county of Norfolk, State of Massachusetts, have invented a certain new and useful Improvement in Warp Stop-Motions for Looms, of which the following is a specification, reference being had therein to the accompanying drawings.

In the majority of the warp stop motions that in practice are employed in looms the drop-wires are disposed in parallel lines or banks, applied to the warp-threads in the interval between the lease-rods, and usually hung upon the lower planes of the lease at front and rear, respectively, of the intersection of the lease. In some cases the dropwires are made with short upper ends designed to terminate below the upper planes of the lease adjacent the crossing, the aim being to reduce the extent to which the warp-threads are exposed to chafing. As applied to the warp-threads close to the intersection of the lease, the pendant lines less crowded therewith, thereby obviating the close massing or congestion of warpthreads and drop-wires above mentioned. I attain this object by constructing the leaserods, 01' it might be either of them, of L- shape in cross-section and arranging and combining the same as disclosed hereinafter. One embodiment of the invention is shown in the drawing, which represents the same applied in connection with parts of a wellknown form of warp stop motion at present in use and substantially shown and described in U. S. Letters Patent No.1,032,542, dated July 16, 1912. Theview is a section in the direction from front to rear, and inof drop-wires hang close together, and th cludes only such parts and features as are Combined presence f th dreewires d useful to be shown in order to make a clear the crossed warp-threads fills the short indisclosure of the nature and relations of the terval between the lease-rods with a closelylIlveIltlOnpacked assemblage of warp-threads and F g Shows the droptwires dropqviresj While b l th th d dlsposed m the customary number, two, of there is a congested mass of drop-wires, banks and hung upon the lower planes of and also the drop-wire guide-bars. The the leased Y P" at front and close massing of the threads and drop-wires Tear respectlvelv 0f Ph9 1nteTSeC t10n 0f the has Several d b k one th f b i lease, with one bank 1n line verticaly with a th t it i t f ith access t th d portion of one lease-rod 3 and. the other bank wires, and with the operations of repairing in line vertically with aportion of the other lease-rod. The gulde-bars 4, 4c, extending broken warp-threads and rethreading them th ugh th i d wi A th i th through the slots of the drop-wires are vertendency to collection of lint. A further tical y e ow the Said portions of the leased wb ek i th f t, th t v wh as rods. The clearance for the upper ends or aforesaid, the drop-wires are hung upon the h adspf th drop-wires is provided by conlower planes of the warp-threads at the op structlng the lease-rods of angle-iron, L- posite sides of the intersection of the lease, shaped 111 Cross-Section, and disposing them and evenw hen they are formed with short a hown, or substantially as shown, with upper ends to avoid contact of their upper H flange thereof upright and the other ends with the threads in the upper planes, horizon al- The drop-wires are engaged nevertheless in the working of a loom the with the warp-threads with their heads in movements of the warp-threads cause the line with the horizontal flanges, and adapted drop-Wires to jump vertically so that their to work within the internal angle between upper ends rise between the threads in the the two flanges of each lease-rod. With the upper planes. Many of the drop-wires rehorizontal flanges facing each other as main up in this position. As a result of shown, access to the warp-threads and dropsuch jumping, and as a result of the dropwires through the opening between the leasewires remaining elevated, there occurs more rods is facilitated. The height of the horior less chafing of the warp-threads. zontal flanges of the lease-rods above the wholly unencumbered with drop-wires, or

' lint to fall lower edges of the vertical flanges permits a suflicient extent of jumping of the dropwires in response to jerking movements of the warp-threads during the weaving action to avoid cutting or chafing the warp-threads againstthe inner edges of the eyes of the drop-wires. The condition of the dropwires may be observed by parting more or less the upper planes of warp-threads be tween the two lease-rods and looking down between the latter. As'will be observed, the parting of the warp-threads of the upper planes will expose to view more or less completely from above the upper portions of the drop-wires notwithstanding the fact that they are in line with the horizontal flanges 3, 3, of the lease-rods.

It will be obvious from the drawing that the interval between the lease-rods is open and clear, with much improved conditions for the warp-threads and the action of the drop-wires, and with ample opportunity for down entirely clear of the warp threads and drop-wires. Upon occasion, additional banks of drop-wires may be employed adjacent the intersection of the lease, thus facilitating the production ofv highsla-yed goods.

As shown, the upward movement of the drop-wires is limited by contact of the bot toms of the slots in the drop-wires with the under edges of the guide-bars 4t, 4. Other provision may be made for limiting the said movement, if desired.

Referring briefly to the features in general as shown in the drawings,the warpthreads 1, l, are shown divided into two planes, ascommon, by a warp-separating rod a located adjacent the lease-rods 3, 3. The latter are shown supported at their ends by the warp stop motion stand Z2, constructed at its top with open-topped seats or sockets3 3 for the corresponding ends of the lease-rods. The said seats or sockets are formed to retain the lease-rods. in their working positions as shown. An intermediate warp-rest c of usual character is supported at its end by the stand, the latter having a socket c for such end located between the sockets 3 3. In common practice, the top of the warp-rest 0 frequently is located a little below the intersection of the lease, as in the drawings. The guidebars 4, 1, extending through the slots of the drop-wires are supported at their ends in sockets 01' seats 4*, 4, with which stand I) is constructed. At cl, 0?, are the back-stop bars for the lower ends of the drop-wires, supported at their endsin sockets with line with the .for one which stand. I) is constructed, with said ends secured in such sockets by clamping screws e,e. reciprocatory feeler, comprising a rod supported by its end resting upon a horizontal ledge 9 upon stand I), and reciprocated in usual manner horizontally along such ledge,

to and fro beneath the normal positions of 1 the drop-wires suspended by the warpthreads. The drawing shows only a portion of the means for communicating the reciprocating movement to the feeler, such portion comprising the connecting-rod h, the arm 2' to which the connecting-rod is connected pivotally, and the rockshaft 7; upon which the said arm is fixed. The means for rocking the rockshaft 7c and bring ing about the stoppage of the loom may be as in the patent aforesaid, or of any other approved character. 7

I claim as my invention:

1. A warpstop-motion for looms having in combination, a rod of L-shape in cross- At f isthei section, the free edge of one flange thereof serving as a warp-guide, and gaged with the warp-threads with their heads in line with the other flange and adapted to work within the internal angle between the two flanges.

2. A warp-stop-motion for looms having in combination, a warp-dividing rod of L- shape in cross-section, the free edge of one flange thereof serving as a guide for one plane, of the warps'and the exterior of the other flange serving as a. guide for the other plane of the warps, with the warp-threads with their heads in work within the internal angle between the two flanges.

drop-wires enthe drop-wires engaged Y other flange and adapted to 3. A warp-stop-motion for looms com- A prising in combination, a pair of lease-rods respectively of L-shape in cross-section with their internal angles facing each other and with one flange of each serving as a guide plane of the warps and the vertical edge of the other flange of. each serving as a guide for the other plane of the warps, and

drop-wires in connection with each of the said rods engaged with the warp-threads with their heads, in line with the first mentioned flange and adapted to work within the internal angle between thetwo flanges.

In testimony whereof I affix mysignature in presence of two witnesses.

GEORGE P. ERHARD. lVitnesses I v I V CI-IAs. F. RANDALL, ELLEN 0. SPRING.

Copies oil/chi: patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. 0. 

